东海赤潮高发区春季叶绿素a和初级生产力的分布特征

摘要/Abstract

摘要： 2002年4～5月对东海海域进行了综合调查,分析了海区叶绿素a和初级生产力的分布特性.结果表明,大面站表层平均叶绿素a浓度为1.086mg·m^-3.分级叶绿素a结果显示,春季东海浮游植物以微型和微微型(<20μm)占优势,其对海区叶绿素a的贡献为64%,超微型浮游植物(<5μm)占浮游植物生物量的27%.营养盐分布和浮游动物的摄食压力影响了叶绿素a及其粒级结构的分布.平均初级生产力为10.091mg·m^-3·h^-1,赤潮跟踪的R-03、RL-01、RG-01站的平均初级生产力为399.984mg·m^-3·h^-1.光和营养盐成为叶绿素和初级生产力平面分布的主要限制因子.表层叶绿素a和初级生产力均在调查海区的123°E纵断面冲淡区产生高值区.DC11站浮游植物生物量异常高,表层叶绿素a达到9.082mg·m^-3,初级生产力为128.79mg·m^-3·h^-1,但并未出现水色异常.

关键词: 叶绿素a, 初级生产力, 分布, 赤潮, 东海

Abstract: The distributions of chlorophyll a and primary productivity were determined during April to May 2002 in the East China Sea. The results showed that the average concentration of chlorophyll a was 1.086 mg·m^-3 at surface layer,and that nano-and pico-phytoplankton (<20μm) dominated the phytoplankton biomass in this sea region during Spring (up to 64% of total chlorophyll a content). Ultra-phytoplankton (<5μm) consisted 27% of total phytoplankton biomass. Nutrients and feeding pressure of zooplankton affected the distribution of chlorophyll a and its size-fractionation. The average primary productivity was 10.091 mg·m^-3·h^-1,while that of red tide tracking stations R-03, RL-01 and RG-01 was 399.984 mg·m^-3·h^-1. Light and nutrients were the main factors affecting the distributions of chlorophyll a and primary productivity. The station DC-11 had a high concentration of phytoplankton biomass.The surface layer concentration of chlorophyll a and primary productivity were up to 9.082 mg·m^-3 and 128.79 mg·m^-3·h^-1, respectively,but the color of the seawater was normal.

Key words: Chlorophyll a, Primary productivity, Distribution, Red tide, East China Sea

中图分类号:

Q175.53

周伟华, 霍文毅, 袁翔城, 殷克东. 东海赤潮高发区春季叶绿素a和初级生产力的分布特征[J]. 应用生态学报, 2003, (7): 1055-1059.

ZHOU Weihua, HUO Wenyi, YUAN Xiangcheng, YIN Kedong . Distribution features of chlorophyll a and primary productivity in high frequency area of red tide in East China Sea during Spring[J]. Chinese Journal of Applied Ecology, 2003, (7): 1055-1059.

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